Induction-motor winding.



F. S. MARTIN.

INDUCTION MOTOR WINDING.

APPLICATION FILED MAY 22. 1911.

Patented July 18, 1916.

WITNESSES:

ATTORNEY menace,

ran

FREDEnIoK s. MAIETIN, or nnonuroon ran r-IiimsYLvAmA, AssIonofl'ro'WEs'rmG HOUSE nzcno'rnrc aim rearroraornnmo corarm, A CORPORATION 017 PENNSYL- VANIA.

iirn'uorion-reoroa winnmo.

Patented Ju y 18,1916;

.pplleation filed folio-y 22, @911. Serial No. 628,741.

To all-whom irmoy concern Be it known that I, FREDERICK S. MARTIN, a citizen of the United States, and a resident of Edgewood Park, in the county of Allegheny and State of Pennsylvania, have invented a new and useful improvement in Induction-Motor il/ indings, of which she following is a specification.

My invention relates to the windings of dynamo-electric vmachines and particularly 'to secondarywmdm'gs for induction motors,

'The object of my invention is to provide a secondary Winding of the squirrel-cage type .thatshall be particularly simple in constructionandeasy to wind one am shall 'comprise a plurality of short-circuited coils and means for holding the end 'por- 'inons of the coils in position under high speed operating conditions.

. Accordi to mv nresent invention 1' ore-- vide a. pluralisy of slotted strips of c in "ends which are spread inio shore circn 'Winding 3 is composed of a nun:

ducting material, having nolclies ll ir coils of diamond shape and are non; suitable slots in the core member or a dynamo-electric 1l12lClllll6. After Elie coils are iii-position, 1' inserl a pair of clamp ng end rings in the coil notches 'and bend the ends of the coils to partially inclose the and rings and hold them in posi Figure l of the accompanying d awings is a plan view and is an ration of" a port-ion of $1 secondary member of a dynamoeleciric machine having Wir' ng constructed and arranged in ac-zrorclzmce w J.

my invention, Fig. 3 is a sectional eleva'l in on the line Ill-Hi of Fig. 1 F is a detail View, on a larger scale, sno one end of a end having a slightly mood arrangement or end notches.

.Referringt'o Tigs. l, :2 and 3 of the d ings, a'substantially' cylindrical lamina. core member l is provided Will i per; slots 2 in which a winding 3 is local, L

gle-turn shorl circuiied coils l shape, each of which is produr ing the two sides of a slotted sri the sfirips are provided with notches 5 in "which a binding ring is located when. she coils are assembled in position, shown in 3. The two sides oi the spread coil are respectively, located in the outer and inner portions of slots that; correspond to the width of the coil, asc'lea'rly shown in Fig.2,

ward the core axis to assist in preventing the Wires from slipping out. i In order to draw the ends 'of the coils inwardly and avoid possibility of their conflicting with the stationary parts of the mofiorlor other machine of which they form parts, the rings or Wires 6 may be shrunk into place. i

The ends of the coils may be provided with notches 7, as shown in Fig. lof the drawings, in addition to thenotches 5 in which the ring or Wire is located, to provide corresponding-opposing projections 8 to be bent toward each other around the Wires.

The rings or wires 6 are formed of conducting material and assist in producing the effect of a squirrel cage winding by acting as short circuiting end rings, although it is not essential that any electrical connections shall be established between the coils.

While the binding rings are shown as circular in cross section, I do not Wish'to be.

limited to this particular form and various changes in details may be efi ected within the spirit and scope of my invention.

I claim as my invention':

1, In a Winding for dynamo-electric machines, the combination with a plurality of conductors having portions thereof spread apartand having notched ends, of binding rings seated in the notches and clamped therein by upset portions of the ends of the conductors.

2., A winding for dynamo-electric -machines comprising a plurality of diamondshapcd coils having notched ends and binding rings seated in the notches and clamped rhelrein by upset portions of the ends of lzhe cm s. l

3. A winding for dynamo-eleci3ric finachines comprising a; plurality of overlapping short circuited diamond-shaped COIlS having notched end projections and binding -rings seated in the notches and clamped ing peripheral slots, coils located in said slots and having'notches in their ends'that are inclinedftow'ard the center of the core .and binding rings seated in the notches and clamped therein by upset portions of the ends of the conductors.

.JA Winding for dynamo-electric ma 'chines'comprising a pluralityof overlapping-short 'circuited diamond-shaped coils having end notches inclined toward the center of the Windin and binding rings seated f in the notches an clamped therein-by upset the conductors -position, the ends of the conductorsrbeifigbent around the rings.

7 A Winding-Tor dynamo-electric machines compriing a plurality of overlapp'or'tions of the ends of the coils.

6. In a Winding for dynamo-electric machines, the combinationWith a plurality of conductors =having portions thereof spread apart and having notched ends, of rings seated in the notches for holding the ends of j ping ishdrfci-rculted.' diamond-shaped coils having notched Ends and binding rings seate duinthe notches to holdthe ends of the coils in position, the ends of the conductors being bent around the binding ring.

8. A winding for a dynamo-electric machine comprising overlapping coils having notches in their ends and rings seated in .said notches and clamped therein ,by in- Wardlybent portions of the coil'ends.

- 9. A dynamo-electric machine comprising a substantially cylindrical core member hav- 'ing a plurality of peripheral slots, a pluralsubscribed my name this 17th day of May,

FREDERICK S MARTIN. Witnesses:

O. N. STARKER, B. B. H1Nias. 

